Récupérer et insérer PHP dans un fichier .js

Bonjour à tous,
J'utilise Raphael-js pour un mode de recherche par département sur un carte de France en .svg;
L'objectif est de transmettre d'un lien html-php une variable (EX:$ref) vers le formulaire de recherche (ou se trouve la carte de France en .svg), plus exactement vers le fichier script.js qui gère la découpe de la carte.

Voila le script:
window.onload = function() {
var paper = new Raphael(document.getElementById('canvas_france'), 600, 600);

var attr = {
fill: "#f5f5f5",
stroke: "#d5d5d5",
"stroke-width": 1,
"stroke-linejoin": "round"
};

var fr = {};
fr.departement2a = paper.path("M 445.33847,488.9562 L 445.33847,491.11245 L 447.30722,492.48745 L 450.61972,494.42495 L 450.83847,495.98745 L 448.86972,496.5812 L 445.74472,497.17495 L 445.74472,498.5187 L 446.90097,499.7062 L 447.11972,503.61245 L 451.40097,504.98745 L 452.96347,505.36245 L 454.33847,507.5187 L 453.36972,508.8937 L 451.80722,509.4562 L 450.61972,511.61245 L 449.46347,512.98745 L 450.02597,516.48745 L 452.96347,516.29995 L 453.74472,516.8937 L 456.49472,515.5187 L 457.27597,516.29995 L 455.90097,519.23745 L 457.27597,520.61245 L 454.93222,522.36245 L 453.36972,525.86245 L 457.65097,526.86245 L 463.71347,527.42495 L 461.18222,530.36245 C 461.18222,530.36245 459.99289,529.90364 459.46347,530.1437 C 459.44782,530.15141 459.41536,530.16589 459.40097,530.17495 C 459.39647,530.17828 459.37406,530.20271 459.36972,530.2062 C 459.36553,530.20986 459.34249,530.23363 459.33847,530.23745 C 459.33478,530.24161 459.31073,530.26437 459.30722,530.2687 C 459.30054,530.27771 459.28192,530.29022 459.27597,530.29995 C 459.27319,530.30499 459.27856,530.32597 459.27597,530.3312 C 459.27118,530.34203 459.24871,530.38211 459.24472,530.3937 C 459.24293,530.39969 459.2463,530.41876 459.24472,530.42495 C 459.24199,530.43772 459.21532,530.47387 459.21347,530.48745 C 459.21207,530.50144 459.21394,530.53512 459.21347,530.54995 C 459.21348,531.52651 457.86972,533.8937 457.86972,533.8937 L 459.80722,536.0187 L 463.33847,538.17495 L 469.96347,539.92495 L 471.90097,540.7062 L 473.68222,541.48745 L 472.49472,543.6437 L 475.61972,543.4562 L 476.21347,544.8312 L 479.33847,544.8312 L 480.11972,541.11245 L 478.15097,540.7062 L 480.90097,537.79995 L 479.93222,536.79995 L 480.11972,535.04995 L 483.65097,533.11245 L 483.83847,530.9562 L 481.49472,530.7687 L 479.93222,532.11245 L 479.93222,530.17495 L 483.05722,529.98745 L 484.02597,527.6437 L 484.80722,520.79995 L 484.21347,517.86245 L 484.15097,515.04995 L 480.74472,517.29995 L 476.68222,517.4562 L 476.33847,514.6437 L 476.86972,513.92495 L 475.61972,513.04995 L 475.27597,508.2687 L 474.74472,507.3937 L 472.61972,507.3937 L 471.55722,506.5187 L 471.55722,503.1437 L 470.15097,502.2687 L 469.08847,501.73745 L 466.96347,499.0812 L 467.11972,497.48745 L 464.49472,497.48745 L 463.58847,494.8312 L 459.86972,494.8312 L 457.93222,492.17495 L 458.46347,491.29995 L 457.24472,490.5812 L 454.40097,491.11245 L 453.33847,490.42495 L 449.46347,490.42495 L 449.08847,489.36245 L 446.90097,488.9562 L 445.33847,488.9562 z ").attr({fill: "#f5f5f5",stroke: "#d5d5d5",title:"Corse du Sud",href:"mur.php?rechdept=1&dept=2a"});

Pour résumer plus simplement, je voudrais me servir du lien si dessus pour insérer ma variable $ref (mur.php?rechdept=1&dept=2a&>>ref=$ref<<.
grand merci à tous pour vos futurs réponses.
cordialement
Damdams64